19-20th century vernacular for the vagina. A 'lum' was initially a slang word for the flue that drew smoke from an open fire up to the chimney on the rooftop. Lum as a slnag term is quite popular with women of a certain age and social background.

The name of the alien invader's(aptly named Invader) beautiful daughter in the anime comedy classic "Urusei Yatsura"

Lum is constantly making her fiancee Ataru Moroboshi's(Supreme Prevert) life a living hell in order for him to finally recognize her as his one and only love interest. She accomplishes this task throughout the series with the help of her various powers, gadgets, friends, etc.

Lum lost to Ataru in the contest over invading Earth, when he finally stole her bikini top and then grabbed her horns.